As you can probably guess, ocean currents are influenced by wind currents. Ocean currents are organized into "gyres": North Atlantic Subtropical, South Atlantic Subtropical, North Pacific Subtropical, South Pacific Subtropical and Indian Ocean Subtropical.
Can you explain why the subtropical gyres in the Northern Hemisphere move in a clockwise fashion while the subpolar gyres rotate in a counterclockwise pattern? How many main currents exist within each subtropical gyre? 75-100